To suppress influence of a rounding error and acquire a more highly precise filter processing result, by performing convolution processing in order from a divided filter having a smaller sum of filter coefficient among divided filters, shifting a position of the decimal point of a filter processing result in a fixed-point format to generate an intermediate image, integrating the filter processing result having a larger bit width of a decimal part, and substantially reflecting a processing result of the decimal part.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An image processing device comprising: a dividing unit configured to divide a filter into divided filters of a predetermined number of taps; a filter processing unit configured to perform filter processing for an input image using the divided filters; and an integrating unit configured to integrate a processing result of each divided filter, wherein the integrating unit integrates the processing result of the each divided filter in an order according to a value of a filter coefficient of the divided filter.
2. The image processing device according to claim 1 , wherein the integrating unit integrates the processing result in order from the processing result of the divided filter having a small sum of filter coefficients.
3. The image processing device according to claim 1 , wherein the integrating unit integrates the processing result of the divided filter having the sum of filter coefficients within a predetermined range.
4. The image processing device according to claim 1 , wherein the filter processing unit selects the divided filter for which the filter processing is performed according to the value of a filter coefficient of the divided filter, and the integrating unit integrates the processing result in order from the selected divided filter.
5. The image processing device according to claim 1 , wherein the filter processing unit changes a position of a decimal point of the processing result according to the value of a filter coefficient of the divided filter.
6. An image processing method comprising: dividing a filter into divided filters of a predetermined number of taps; performing filter processing for an input image for each divided filter using the divided filters; and integrating a processing result of each divided filter, wherein, in the integrating, the processing result of the each divided filter is integrated in an order according to a value of a filter coefficient of the divided filter.
7. The image processing method according to claim 6 , wherein the integrating integrates the processing result in order from the processing result of the divided filter having a small sum of filter coefficients.
8. The image processing method according to claim 6 , wherein the integrating integrates the processing result of the divided filter having the sum of filter coefficients within a predetermined range.
9. The image processing method according to claim 6 , further comprising selecting the divided filter for which the filter processing is performed according to the value of a filter coefficient of the divided filter, and integrating the processing result in order from the selected divided filter.
10. The image processing method according to claim 6 , further comprising changing a position of a decimal point of the processing result according to the value of a filter coefficient of the divided filter.
11. A non-transitory computer readable storage medium for causing a computer to execute the steps of: dividing a filter into divided filters of a predetermined number of taps; performing filter processing for an input image for each divided filter using the divided filters; and integrating a processing result of each divided filter, wherein, in the integrating, the processing result of the each divided filter is integrated in an order according to a value of a filter coefficient of the divided filter.
12. The non-transitory computer readable storage medium according to claim 11 , wherein the integrating integrates the processing result in order from the processing result of the divided filter having a small sum of filter coefficients.
13. The non-transitory computer readable storage medium according to claim 11 , wherein the integrating integrates the processing result of the divided filter having the sum of filter coefficients within a predetermined range.
14. The non-transitory computer readable storage medium according to claim 11 , further comprising selecting the divided filter for which the filter processing is performed according to the value of a filter coefficient of the divided filter, and integrating the processing result in order from the selected divided filter.
15. The non-transitory computer readable storage medium according to claim 11 , further comprising changing a position of a decimal point of the processing result according to the value of a filter coefficient of the divided filter.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
July 30, 2015
January 3, 2017
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.